12 citations · 45 across the 13 of their papers we have counts for
13 papers
On subgroups of Brin-Thompson groups
Sadayoshi Kojima, Xiaobing Sheng
We prove that the Brin-Thompson group is torsion locally finite for which is known only when , and contains continuum many copies of the additive group…
Normalized Entropy versus Volume
Sadayoshi Kojima, Greg McShane
Thanks to a recent result by Jean-Marc Schlenker, we establish an explicit linear inequality between the normalized entropies of pseudo-Anosov automorphisms and the hyperbolic volu…
Minimal dilatations of pseudo-Anosovs generated by the magic 3-manifold and their asymptotic behavior
Eiko Kin, Sadayoshi Kojima, Mitsuhiko Takasawa
This paper concerns the set of pseudo-Anosovs which occur as monodromies of fibrations on manifolds obtained from the magic 3-manifold by Dehn filling three…
Entropy, Weil-Petersson translation distance and Gromov norm for surface automorphisms
Sadayoshi Kojima
Thanks to a theorem of Brock on comparison of Weil-Petersson translation distances and hyperbolic volumes of mapping tori for pseudo-Anosovs, we prove that the entropy of a surface…
Entropy vs volume for pseudo-Anosov maps
Eiko Kin, Sadayoshi Kojima, Mitsuhiko Takasawa
We will discuss theoretical and experimental results concerning comparison of entropy of pseudo-Anosov maps and volume of their mapping tori. Recent study of Weil-Petersson geometr…
Circle packings on surfaces with projective structures and uniformization
Sadayoshi Kojima, Shigeru Mizushima, Ser Peow Tan
Let Σ_g be a closed orientable surface of genus g \geq 2 and τa graph on Σ_g with one vertex which lifts to a triangulation of the universal cover. We have shown that the cross rat…